Even if we define the potential to be zero at infinity, the potential created by a charge distribution can be negative at another point.

Question

Quizplus · Accepted Answer

The potential at a point due to a charge distribution is determined by the work done to bring a unit positive charge from infinity to that point. If the point is closer to negative charges or within a distribution of opposite charge, the potential can indeed be negative, reflecting that work is done by the electric field on the unit charge.

Even If We Define the Potential to Be Zero at Infinity